atm: update msg_namelen in vcc_recvmsg()
authorMathias Krause <minipli@googlemail.com>
Sun, 7 Apr 2013 01:51:47 +0000 (01:51 +0000)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 1 May 2013 16:41:04 +0000 (09:41 -0700)
commit0e242b8561d006aa66c12ab997cc3d729cf2c9ca
tree254267c454c08f4ce4ca20273cd88498781e9397
parentbf6f841f7fde2731ea39698064a81492ce777fa6
atm: update msg_namelen in vcc_recvmsg()

[ Upstream commit 9b3e617f3df53822345a8573b6d358f6b9e5ed87 ]

The current code does not fill the msg_name member in case it is set.
It also does not set the msg_namelen member to 0 and therefore makes
net/socket.c leak the local, uninitialized sockaddr_storage variable
to userland -- 128 bytes of kernel stack memory.

Fix that by simply setting msg_namelen to 0 as obviously nobody cared
about vcc_recvmsg() not filling the msg_name in case it was set.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/atm/common.c